lol, im sory bro, but if the 99 is anything like my 05...you better not have a shop do it. My friend i am in no way what so ever that mechanicly inclinde or w.e that ****in phrase is...but you can do this yourself. If at the verry least your slip on came with instructions. all you have to do is losen your orig. SLIP on and SLIP the other SLIP on...well..on.
But...to answer your question, if its at all the same as the 05....i would offer to pay no more then...$20 for the fact you need to unscrew about a total of 4 screws.
on my 99 all you need is a socket and a c-spanner (those standard size wrenches) or anything else to hold the nut on the hanger as you turn the bolt, also you will need some pliers and maybe a friend to pull off the retention spring on your pipe,
now i bought my bike already with an exaust but the stock>aftermarket should be the same as AM>AM, just take off the old pipe and slide the new pipe into place use the new hanger and tighten the whole thing down... should take a total of 10 min if you are slow
You may want to buy some exhaust sealant. I had to use that on a Micron pipe I bought two years ago. Its available at your local powersport dealership. All you do is put it on the pipe kinda like a thread lock on threads and let it dry after assembly. If you start the bike, it'll spit out. You may also want to use blue Loctite because of vibrations.
This is just an example, your dealer should have something specific for this application. I have some in my tool kit if you need the specific name, send me a PM.
A specialist silicone adhesive gasket maker & sealant which bonds glass to metal and is chemical & temperature resistant to 300°C
Not to bust chops, but I am not mechanically inclined what so ever and I changed mine out. If you need help, just hop on the forum and ask. If you pay the dealership to do it....well, that's just wrong.